YozoraAtlas

How dark is the sky in Liguria?

Sky darkness for 6 towns and parks in Liguria, worked out from NASA satellite images of light at night (2025). 2 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Aveto Natural Regional Park (21.02, Bortle 4), the brightest Genoa (18.70, Bortle 7). Milky Way season in Liguria runs April to August: on moonless nights the bright core stands clear of the horizon, climbing to about 17° at its highest.

19 Bortle class, 1 pristine to 9 city center park or dark-sky place city

Numbers like 21.95 or 16.97 are the brightness of the sky overhead on a clear, moonless night, in mag/arcsec². The scale runs backwards: a lower number means a brighter sky, from about 22 for a natural sky to about 17 in a city center.
How the readings are made

NASA satellite night-lights map of Liguria with every place marked

Darkest skies in Liguria

  1. Aveto Natural Regional ParkBortle 421.02
  2. Beigua Regional ParkBortle 420.82

Among the places on this site. Plenty of land between them is just as dark, with no town or park to name it by.

Brightest city skies in Liguria

  1. GenoaBortle 718.70
  2. SavonaBortle 718.93
  3. La SpeziaBortle 619.07

All 6 places in Liguria

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Aveto Natural Regional Park4Beigua Regional Park4Cinque Terre National Park5Genoa7La Spezia6Savona7